"Here there is no Greek or Jew, circumcised or uncircumcised, barbarian, Scythian, slave or free, but Christ is all, and is in all."
Some theological writers have pointed out that this coincides with citizenship of the Socratic kosmos. Marcus Aurelius and Epictetus wrote about the idea of a single world state of which all of mankind are citizens.
"For we know in part and we prophesy in part, but when perfection comes, the imperfect disappears. When I was a child, I talked like a child, I thought like a child, I reasoned like a child. When I became a man, I put childish ways behind me. Now we see but a poor reflection as in a mirror; then we shall see face to face. Now I know in part; then I shall know fully, even as I am fully known."
1 Corinthians 13:9-12
Some traces of the Platonic Idea may be found here. Plotinus spoke of a return to God termed "katharsis" which he claimed to have achieved while living(!!!). A yearning for communion with God by liberation of the body thus completing a return was also written of by Posidonius. Just a couple examples from a probable many.
R. H. Pfeiffer in History of New Testament Times writes that philosophy was trending towards monotheism in the intertestamental and apostolic periods, so some overlap would be expected.
"Then I heard the voice of the Lord saying, 'Whom shall I send? And who will go for us?'
And I said, 'Here am I. Send me!'"